PJB-2019-747
Seed priming with natural growth regulators altered the concentration of nutrients and endogenous hormones of sweet sorghum under salt and high-temperature stresses
Nimir Eltyb Ahmed Nimir
Abstract
Salinity and temperature are the main abiotic stresses which can disrupt the endogenous hormones concentration on plant. A controlled experiment was conducted to investigated the impact of (288.7 µM GA3, 232.3 µM kinetin and 362 µM Salicylic acid) on ions content (Na+, Ca+2, Mg+2, K+ and P) and endogenous concentrations of gibberellic acid (GA3) and abscisic acid (ABA) of sweet sorghum under salinity (0, 100 and 200 mM NaCl) and temperatures (25°C and 37°C). The results showed that Ca+2, Mg+2, K+ and P content were decreased when salinity levels increased. While, Na+ was enhenced by high salinity. The highest concentration of GA3 was found in medium salinity (100 mM NaCl) level, where the highest ABA concentration was recorded at high salinity (200 mM NaCl) level. All the ions content significantly increased by hormone treatments. The highest GA3 and lowest ABA concentrations were recorded at 362 µM Salicylic acid (SA). Both GA3 and ABA were increased by 37°C temperature. Salinity and temperature stress affected negatively on ions content. Appropriate seed priming with hormones like 362 µM SA could increase the endogenous GA3 concentration and improved the absorption of essential nutrients.
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